Poor soil quality can be improved by: adding phosphorous planting legumes killing bacteria all of the above

adding phosphorous, planting legumes

The concentration of organic phosphorus remains very low. A phosphorus can be added in the soil by fertilizers, animal manure and organic matter. It increases the fertility of the soil. Planting legumes can also, improve the soil quality, as legumes trap the atmospheric nitrogen with the help of soil bacteria. Both nitrogen and phosphorus are necessary for plant growth. Killing bacteria will not improve the soil quality as these bacteria will help in decomposition of the organic matter present in the soil, which results in the liberation of essential minerals like phosphorus, carbon and others in the soil, making it more fertile.

the answer is: they rebelled against saddam hussein’s rule.

kurds opposed saddam rule and wanted independence. kurds in the north and shiites in the south revolt against hussein.

for example, the halabja attack in 1988 conducted against the kurdish people by the iraqi regime under saddam hussein, where between 4000 people are killed and around 9000 are injured.